[avida-cvs] avida CVS commits: /current/source/tools stat.hh

[dule123]

dule123		Fri Oct 10 20:51:19 2003 EDT

  Modified files:              
    /avida/current/source/tools	stat.hh 
  Log:
  
  fixing the formula used to calculate Standard Error in various parameters
  
  
  
Index: avida/current/source/tools/stat.hh
diff -u avida/current/source/tools/stat.hh:1.8 avida/current/source/tools/stat.hh:1.9
--- avida/current/source/tools/stat.hh:1.8	Sat May 17 02:48:15 2003
+++ avida/current/source/tools/stat.hh	Fri Oct 10 20:51:18 2003
@@ -111,7 +111,11 @@
     //n*(s2/n - s1/n*s1/n) / (n-1) : INF_ERR; }
   double StdDeviation() const { return sqrt(Variance()); }
   double StdError()  const { return (n > 1) ?
-       sqrt(s2 / (n * (n-1))) : INF_ERR; }
+         sqrt(Variance()/n) : INF_ERR; }
+
+//      old formula, implemented by TCC, not sure how it relates to 
+//      the real Standard Error
+//       sqrt(s2 / (n * (n-1))) : INF_ERR; }
 
   double Skewness() const { return ( n > 2 ) ?
        (n*s3 - 3*s2*s1 + 2*s1*s1*s1/n) / ((n-1)*(n-2)) : INF_ERR; }